S'okay, I'm used to waiting for Mac users.
(joke)
Mine
Yours
What that command did was as I feared. It went through ALL of your templates and replaced the Smarty Tags
{$lng.lbl_recover_password} with the value (at the time you did this) for that language variable.
So basically when you try to update the value in the admin, it is updating the database, but the templates are no longer going to the database for the value. It has been HARD coded into the template.
I can see some (but little) value in this.
So... if you want to change any text now you will have to edit the template directly. You cannot just update from the admin. The big issue is that if you want to edit text that is common throughout the site, you no longer make one change in the admin. You have to change every single instance of that text in the templates.
Please tell me you have a backup. I don't think this is what you wanted to do. My belief is that you wanted to eliminate all languages except English.